Substation telephone set



Nov. 15, 1927.

J ERICKSON ET AL SUBSTATION TELEPHONE SET A HEPEEFT F UZJEP Nov. 15, 1927.

' J. ERICKSON ET AL SUBSTATION TELEPHONE SET 5 Sheets-Sheet 2 Original Filed April 10, 1922 *za ia -w [L'LUEZL UPS HEPEFFTF UZJEP Till Juhn-Emuksun HIT:

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Nov. 15, 1927.

J. ERICKSON ET AL SUBSTATION TELEPHONE SET Original Filed A ril 10, 1922 3 Sheets-Sheet 3 II'LUE'L'L UP5- HEPD'ETTE UZJEP 5Z2Juhn Emcksun wywzzaaw 517 Patented Nov. 15, 1927..

UNITED STATES PATENT ,hddh'i F l l JOHN ERIGKSON, OF CHICAGO, AND HERBERT F. OBERGFELL, OF RIVER FOREST, ILLL- NOIS, ASSIGNORS T0 AUTOMATIC ELECTRIC, INC., OF CHICAGO, ILLINOIS, A COR- EQBATION OF DELAWARE.

SUBSTATION TELEPHONE SET.

Original application filed April 10, 1922, Serial No. 551,351. Dividedand this application filed August 28, 192i. Serial No. 734,688.

The present invention relates in general to substation telephone sets, and more particularly to substation desk stands of the automatic type.

The general object of the invention is to provide a new and improved automatic desk set which has a number of mechanicalinr provements tending to increase its serviceability and cheapen its cost of manufacture.

This invention is a division of a parent case Patent No. 1,612,621, issued Dec. 28, 1926.

In accordance with a particular feature of the invention, a terminal assembly of novel construction is provided to which the connecting wires of the instrument may be attached.

The foregoing and other objects of the invention will be described hereinafter, ref erence being had to the accompanying draw- 111 s.

Tt may be pointed out at this time that all the drawings are full size with the 8X-.

ception of Fig. 1, which has been drawn to a slightly reduced scale in order to enable the telephone instrument to be shown in full on one sheet of drawings.

Referring now to the drawings,

Fig. 1 is a side view of an automatic desk telephone set, with the receiver removed, which embodies the several features of the invention.

Fig. 2 is a front view, partly in section along the line AA, Fig. 1, of the same instrument, and gives a general idea of its internal construction.

Fig. 3 is a side view of the metal strip which serves as a mounting plate for the switch-hook spring assembly.

Fig. 4 is a fragmentary view of the upper end of the tubular standard.

Fig. 5 is a view of the telephone from below with the base removed and shows the arrangement of the connecting terminals, calling device, and various other details.

Fig. 6 is a view of the bracket which serves as a mounting place for the terminal strip.

Fig. 7 is a detail showing of a cross section view of one of the connecting terminals.

Referring now particularly to Figs. 1, 2, 3, and 4c, the base 1 is preferably a metal stamping of the form shown. The tubular standard 3 is provided at its upper end with a transverse slot 70 (shown in detail in Fig. 1) that permits the switch-hook to move up and down, while its lower end is forced out to form the shoulder 20. The tubular standard is placed in position in the base 1 and the lower end is then expanded by special machinery so that, for all purposes, the tubular standard 3 and the base 1 may be considered to be in one piece.

It will be seen that the strip 21 is secured to a projection on the transmitter support- 6 by the screws 26, 27, and 28 (shown in Fig. 8). The switch-hook 1 works on the pivot 63, the latter being secured in place between the transmitter support 6 and the strip 21 bV the screws 26, 27, and 28, the projection oh the transmitter support being slotted, as shown, to form a retaining means for the pivot. The switch-hook 1 extends through the slot 65 in the strip 21 and directly controls the main spring 32 of the spring assembly, the well known function of the springs being to close the line circuit when the receiver is removed. The stud or boss 2st is stamped from the strip 21 and serves to limit the upward movement of the switch-hook 1 under influence of the spring 32 when the receiver is removed. The stud 25 which is also punched from the metal strip serves as a stop to limit the downward movement of the switch-hook when the receiver is replaced thereupon. The screw 26 is not countersunk, as are the screws 27 and 28, but is somewhat longer and serves as a guide for the wires leading to the transmitter so that these wires do not interfere with the switchhook operation. The metal strip 21, which serves as a mounting plate for the switch hook spring assembly, is slotted at 31 and 23, through which the connecting conductors are passed. Through the lower end of the strip 21 is a pin 22 which maintains the strip 21 rigidly in place in the tubular standard 3.

Referring now more particularly to Figs. 2, 5, 6, and 7, the bracket 38 which serves as a mounting plate for the connecting termi nals has an extended portion, the whole being fastened in place by the eye rivet 5. The extended portion of the bracket 38 is curved (see Fig. 6) so that it fits closely around the lower end of the tubular standard. By this construction the bracket 38 is 'as a pivot.

prevented from turning with the eye rivet 5 The eye rivet 5 also serves as an eyelet through which the receiver cord and the connecting cord from the bell box are brought.

The micarta strip 40 is fastened to the bracket 38 by means of the screws 47, 48, and 49. The screw 49 is extended so that when screwed into place there is a projecting portion which serves as a place to which the end of the receiver cord may be tied to take the strain off the wires, as is the usual practice.

From the detailed view of one of the connecting terminals shown in Fig. 7, it will be seen that the terminal 52 extends around the micarta strip 40 and fits into a notch therein. There are two holes in the connecting terminal one above the other. Imbedded in the micarta strip 40 is a nut 66. The terminal screw 46 is adapted to go through the hole in the connecting terminal and screw into the nut 66. In this manner the terminal screw 46, when screwed tightly into place, will hold the terminal of any one of the connecting wires attached to it tightly in place under all conditions.

The calling device 8 is of the usual construction and is fastened to an adapter plate 75 by means of the screw 72 and the studs 73 and 74. The adapter plate, to which the dial is fastened, lies over an opening in the upper portion of the base 4 and is held firmly in place by the screws 79 and 71. This adapter plate is used because the hole in the base is arranged so that various types of dials may be used without changing the construction of the base. The dial used in the present case requires the adapter plate 20 be employed in order to secure a proper The bottom 7, (see Fig. 2) is fastened in place by the screw 41 which goes into the end of the metal strip 21, the latter being bent at right angles and threaded to receive it. It will be noted that the screw 41 is only threaded for a short distance and also that there is a washer 78 between the base and the threaded portion. This construction enables the bottom 7 to be removed and the screw 41 will remain associated with it, the threaded portion of the screw preventing it from slipping through the washer.

To assemble the set, the metal strip 21 to which is fastened the transmitter support 6, is slipped into the tubular standard 3 until the shoulder 30 engages the top portion of the. standard, the switch-hook 1 coming in the slot 70. The screw 19 is then tightened until it engages with the edges of the slot of the tubular standard (see Fig. 1). It will be noted that the screw 19 is tapered so that when the same is tightened the metal strip 21 carrying the switchhook 1 is automatically centered in position; This construction enables the set to be readily assembled without a great deal of time being spent in obtaining a proper adjustment between the switch-hook l and the slot 70 so that the switch-hook 1 does not bind on the sides of the slot. In this manner the metal strip 21- and the transmitter support 6 is held in position. The bottom 7 is then placed over the base and the screw 41 tightened. The entire assembly is thus held in place by two screws 19 and 41, the pin 22 holding the strip 21 in a rigid vertical position. The screw 19 in addition to its function of automatically centering the metal strip 21 and the receiver hook in position, enables the bottom 7 to be removed to, expose the terminal strip without the metal strip 21 becoming loose in the tubular standard. Thus, when the phone is being repaired, the bottom 7 may be removed and the phone turned up side down without the strip 21 and transmitter support 6 becoming loose.

The features of the invention having been described, what is considered to be new and desired to have protected by Letters Patent.

will be pointed out in the appended claims.

What is claimed is:

1. In a telephone desk stand, the combination, with a hollow base, of a bracket mounted in said base, a terminal strip supported on said bracket, and an eye rivet comprising the sole means for securing said bracket within said base, said rivet also serving as an eyelet through which conductors may be brought to said terminal strip.

2. In a telephone desk stand, the combination, with a tubular standard and a hollow base, of a bracket mounted in said base, a terminal strip supported on said bracket, a tubular rivet passing through said bracket and base and comprising the sole means for holding the two together. and an extension of said bracket bearing against the lower end of said standard to prevent the bracket from turning on said rivet as a pivot.

3. In a telephone desk stand, a hollow base, a semi-circular mounting bracket mounted in said base, a semi-circular terminal strip in said base having a plurality of terminals thereon, an insulating spacer arranged between said terminal strip and said bracket, means at each end of said bracket for supporting said terminal strip and spacer thereon, an extension on said bracket, and an eye rivet attached to said extension comprising the sole means for securing said bracket within said base, said rivet also serving as an eyelet through which a cable may be brought to said terminal strip.

4. In a telephone desk stand, a hollow base, a semi-circular mounting bracket mounted in said base, a semi-circular terminal strip in said base having a plurality of terminals thereon, a cut out portion for each terminal along the edge of said terminal strip for engaging the terminal and locking it from lateral movement thereof, an insulating spacer arranged between said terminal strip and said bracket, means at each end of said bracket for supporting said terminal strip and spacer thereon, an extension on said bracket, and an eye rivet attached to said extension comprising the sole means for securing said bracket within said base, said rivet also serving as an eye let through which a cable may be brought to said terminal strip.

5. In a telephone desk stand, a hollow base therefor, a semi-circular terminal strip in said base having a plurality of terminals thereon, an insulating spacer arranged adjacent to said terminal strip, and a semicircular mounting bracket having an extension and an eye rivet attached thereto for mounting said bracket on said base, said terminal strip and said spacer supported on said bracket at both ends by screws.

In witness whereof, I hereunto subscribe my name this 26th day of August, 1924.

JOHN ERIOKSON.

In witness whereof, I hereunto subscribe my name this 26th day of August, 1924.

HERBERT F. OBERGFELL. 

